Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
Which of the following statements give the TRUE difference between evaporation and boiling?
i. Evaporation occurs at all temperatures while boiling occurs at a fixed temperature for a given pressure.
ii. Evaporation is a surface phenomenon while boiling is an interior phenomenon.
iii. Evaporation is affected by surface area while boiling is not.
i and ii only
i and iii only
ii and iii only
i, ii, iii.
Correct answer is D
No explanation has been provided for this answer.
specific heat capacity of ice
specific heat capacity of water
specific latent heat of fusion
specific latent heat of vaporization
Correct answer is D
No explanation has been provided for this answer.
33.3mm
36.0mm
96.0mm
136.0mm
Correct answer is D
200mm ..... 100oC
Xmm ..... 60oC
400mm ..... 0oC
x−40200−40 = 60−0100−0
X = 136mm
420S
336S
168S
48S
Correct answer is B
Heat energy = Elect. energy
mcθ = power x time
2 x 4200 x (100 - 20) = 2000 x t
t = 336s
The equation PxVyTz = constant in charles' law when
x = 1, y = -1, z = 1
x = 0, y = 1, z = -1
x = 1, y = 0, z = -1
x = 0, y = 1, z = 1
Correct answer is B
According to Charles' law, the volume of a given mass of gas is directly proportional to its absolute temperature at constant pressure.